The expression levels of autophagy-related genes such as microtubule-associated protein light chain 3 (LC3) and Beclin-1 have been shown to be reduced in the serum, PF, and eutopic endometrial tissue of patients with EMs compared with the levels in healthy controls (Sui et al., 2018), and the level of expression of autophagy-related genes (LC3B-II) was significantly reduced in ectopic endometrium compared with that in the eutopic endometrial tissues of patients with EMs (Li et al., 2018). The gene discussed is BECN1; the disease is eosinophilia-myalgia syndrome.